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Dissertations / Theses on the topic 'Constitutive Modelling'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 June 2025

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1

Larsson, Rikard. "Constitutive Modelling of High Strength Steel." Thesis, Linköping University, Department of Management and Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8157.

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<p>This report is a review on aspects of constitutive modelling of high strength steels. Aspects that have been presented are basic crystallography of steel, martensite transformation, thermodynamics and plasticity from a phenomenological point of view. The phenomenon called mechanical twinning is reviewed and the properties of a new material type called TWIP-steel have been briefly presented. Focus has been given on phenomenological models and methods, but an overview over multiscale methods has also been given.</p>

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2

Häggblad, Hans-åke. "Constitutive modelling of hard metal powder." Licentiate thesis, Luleå tekniska universitet, Material- och solidmekanik, 1985. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17673.

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3

Zhang, Bo. "Constitutive modelling of municipal solid waste." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/7984.

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Design of landfills must consider both stability and integrity of the lining system. Therefore, stresses and strains in both mineral and geosynthetic lining materials must be controlled. Interaction between waste and barrier system is of particular importance for assessing the stability and structural integrity of steep non-self supporting barrier systems. The most appropriate approach to assess the interaction is the use of numerical modelling techniques, and therefore an appropriate constitutive model for waste material is required to represent its mechanical behaviour. In a literature revie

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4

Kullaa, Jyrki. "Constitutive modelling of fibre-reinforced brittle materials /." Espoo : Technical Research Centre of Finland, 1998. http://www.vtt.fi/inf/pdf/publications/1998/P358.pdf.

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5

Mashoof, Said. "The mathematical modelling of concrete constitutive relationships." Thesis, City University London, 1989. http://openaccess.city.ac.uk/7952/.

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The available experimental evidence demonstrates the extreme nonlinear material behaviour of reinforced concrete structures. These nonlinear effects are attributed to the collective behaviour of the constituent materials in addition to factors such as cracking, crushing, aggregate interlock, creep, shrinkage, bond slip and rate of loading. Analytical methods have been improved in the past two decades as a result of the availibility of more powerful computers. It is, therefore, feasible to model these nonlinear features in order to conduct an analysis of the behaviour of reinforced concrete str

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6

Gallipoli, Domenico. "Constitutive and numerical modelling of unsaturated soil." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325448.

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7

Tan, Sia Min. "Constitutive and numerical modelling of bonded geomaterials." Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435993.

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8

Ellison, Kirk Carr. "Constitutive modelling of a heavily overconsolidated clay." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610606.

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9

Diambra, Andrea. "Fibre reinforced sands : experiments and constitutive modelling." Thesis, University of Bristol, 2010. http://hdl.handle.net/1983/5135b1d5-8cd2-43fb-b204-3736d4beb6c3.

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The techniqueo f reinforcing soils with discrete flexible fibres is slowly gaining acceptancea nd support between practising engineers. However, little is known about the main factors governing the behaviour of this material and the main characteristics of its behaviour. This means that the applicability and potential of this soil improvement method have not been resolved. The present research aims to provide a considerable contribution in understanding the mechanisms governing the behaviour of this reinforced material and to develop a modelling tool which allows the-prediction of its mechanic

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10

Mallinder, Peter Alan. "Constitutive-based masonry vault mechanisms." Thesis, Sheffield Hallam University, 1997. http://shura.shu.ac.uk/20007/.

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The objective of the research programme has been to investigate the behaviour of masonry arch vault collapse mechanisms in the context of the problems besetting the national bridge stock. The programme has primarily involved masonry constitutive theoretical studies, supported by laboratory experimentation, which have led to the formulation of novel masonry hinge modelling. The modelling has been developed for practical application in a four hinge masonry vault mechanism analysis and subjected to testing. The technique has been applied in the field supported by a novel application of informatio

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11

Solowski, Wojciech Tomasz. "Unsaturated soils : constitutive modelling and explicit stress integration." Thesis, Durham University, 2008. http://etheses.dur.ac.uk/2083/.

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12

Vaziri, Reza. "On constitutive modelling of fibre-reinforced composite materials." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29311.

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A relatively simple but comprehensive constitutive model is presented herein for predicting the nonlinear behaviour of laminated composite structures comprising layers of unidirectional and/or bidirectional (e.g. woven) fibre-reinforced materials (FRMs). The FRM layer is treated as an orthotropic but homogeneous continuum undergoing isothermal infinitesimal deformation. The proposed constitutive model for single layers of FRM is built within the framework of rate-independent theory of orthotropic elastoplasticity. The constitutive equations so developed, are then superimposed using the classi

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13

Wiegand, Jens. "Constitutive modelling of composite materials under impact loading." Thesis, University of Oxford, 2009. http://ora.ox.ac.uk/objects/uuid:a69dfe4c-32d4-46ed-af12-d1a9c200f2df.

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In this thesis a constitutive model is developed for the numerical prediction of UD composite material behaviour under impact loading. Impact induced loading usually results in three dimensional stress states which significantly influences the failure behaviour. The heterogeneous nature of composite materials, in particular, results in a complex failure behaviour which manifests itself in various failure modes. Predicting the onset and evolution of these failure modes requires the use of physically based three dimensional theories for the prediction of the onset of damage and subsequent damage

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14

Bower, Thomas. "Constitutive modelling of soils and fibre-reinforced soils." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/100681/.

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This thesis covers two major themes: the first relates to the development of a constitutive soil model, and the second is the development of a model to predict the behaviour of fibre-reinforced soils. The hardening soil (HS) model is an advanced constitutive plasticity model which is applicable to the analysis of many soil types including sands and clays (Schanz et al., 1999; Benz, 2007). This model is explored in depth, and several improvements to the model are proposed. The first improvement is the formulation of a new hardening shear yield surface to replace the previous hardening shear sur

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15

Mead, David Wayne. "Modelling polydisperse polymer melts with single integral constitutive equations." Thesis, University of Cambridge, 1988. https://www.repository.cam.ac.uk/handle/1810/250917.

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16

Ma, Jan. "Constitutive modelling of the densification of porous ceramic components." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286645.

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17

Hogan, John. "Constitutive modelling of elastomers using the finite element method." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322740.

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18

Yin, Yuan 1977. "Towards mechanism-based constitutive modelling of L1₂ crystal plasticity." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29742.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.<br>Includes bibliographical references (leaves 83-85).<br>A single-crystal plasticity model of the L12 structure intermetallic compound Ni3Al is developed, in light of recent theoretical developments and experimental evidence. Computational results show that the model is capable of predicting the major anomalous mechanical behaviors of L12 structures, including increase of yield strength with increasing temperature, strong orientation dependence of the yield stress, tensioncompression asymmetry, a

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19

Silva, Anderson Peccin da. "Constitutive modelling of fibre-reinforced sands under cyclic loads." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/153323.

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Carregamentos cíclicos são causados de diversas maneiras, como tráfego de veículos, ondas, vento e terremotos. Nos últimos anos, particularmente, tem-se aumentado o número de estudos para este tipo de carregamento devido ao desenvolvimento da engenharia offshore. Além disso, técnicas de melhoramento de solos granulares têm sido empregadas para alterar as características dos solos naturais, com o objetivo de aumentar sua resistência e retardar - ou evitar - a ocorrência de liquefação. Alguns estudos anteriores desenvolveram leis constitutivas completas para areias reforçadas com fibras sob carr

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20

Jousset, Pierre. "Constitutive modelling of structural adhesives, experimental and numerical aspects." Compiègne, 2010. http://www.theses.fr/2010COMP1881.

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Le collage structural est une alternative innovante et efficace à des procédés d'assemblages plus traditionnels comme le soudage ou le rivetage. Cependant, cette technologie est encore relativement récente et l'évaluation systématique de la tenue mécanique des assemblages collés est absolument nécessaire. Cela revient à connaitre non seulement les performances et le comportement mécanique de l'adhésif lors de tests mécaniques standards en laboratoire mais également au sein de structures collées réelles où les substrats ont des géométries souvent complexes. La simulation numérique par éléments

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21

Oliver, Graeme John. "Modelling of welding with various constitutive models for steel." Master's thesis, University of Cape Town, 1994. http://hdl.handle.net/11427/17443.

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Bibliography: pages 102-106.<br>This dissertation is an attempt at the quality analysis of constitutive modelling of welding as a coupled thermo-mechanical or thermo-mechanical-metallurgical problem. Three types of inelastic theories of continua: unified viscoplasticity based on dislocation density theory, unified viscoplasticity based on potential theory, and transformation induced plasticity have been chosen for quantitative investigation. Material models proposed by Anand, Estrin and Mecking, Estrin, Robinson, and Leblond et.al. have been implemented into the finite element program ABAQUS.

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22

Pond, Damien. "Constitutive modelling of the skin accounting for chronological ageing." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25376.

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The skin is the largest organ in the human body. It is the first line of contact with the outside world, being subject to a harsh array of physical loads and environmental factors. In addition to this, the skin performs numerous physiological tasks such as thermo-regualtion, vitamin D synthesis and neurotransduction. The skin, as with all biological tissue, is subject to chronological ageing, whereby there is a general breakdown of tissue function and a decline in mechanical properties. In addition to this, skin undergoes extrinsic forms of ageing through exposure to external factors such as u

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23

Drakos, Stefanos. "Applications of artificial intelligence in constitutive modelling of soils." Thesis, Swansea University, 2008. https://cronfa.swan.ac.uk/Record/cronfa42782.

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An appropriate constitutive model embedded in a finite element engine is the key to the successful prediction of the observed behaviour of geotechnical structures. However, to capture the behaviour of geomaterials accurately, the constitutive models have to be complex involving a large number of material parameters and constants. This thesis resents a methodology for converting or recasting complex constitutive models for eomaterials developed based on any constitutive theory into a fully trained Artificial neural Network (ANN), which is then embedded in an appropriate solution code. The sengt

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24

Ruiz, Restrepo Daniel Felipe. "Hydro-mechanical analysis of expansive clays : constitutive and numerical modelling." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/669205.

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Bentonite-based materials are being currently considered in several countries as a backfill component in the multi-barrier concept for deep geological disposal of radioactive waste. The bentonite barrier fulfils several important functions: i) high swelling capacity to fill gaps and compress the excavation damaged zone and ii) very low hydraulic conductivity and important retention capacity which retards significantly radionuclides transport. Small-scale testing in geotechnical laboratories and in-situ experiments in underground research laboratories (URL) have demonstrated that initial state,

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25

Oualmakran, Mohamed. "Multi-scale behaviour of aggregated soils:Experimental characterization and Constitutive modelling." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/222938.

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Natural and other aggregated or structured soils present peculiar mechanical behaviour which differs, in some parts, from the behaviour of soils reconstituted in laboratory. This difference can be explained by a specific structure which gathers the particles arrangement and bonding. However, numerous constitutive models were originally based on the behaviour of reconstituted soils. Therefore, classical models should be extended in order to reproduce more complex features of behaviour linked to the soil structure. This work provides a general framework to describe and predict the behaviour of a

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26

Ng, Pui-lam. "Constitutive modelling and finite element analysis of reinforced concrete structures." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B3897566X.

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27

Al-Sharrad, Muayad A. "Evolving anisotropy in unsaturated soils : experimental investigation and constitutive modelling." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/3828/.

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This work explores the influence of evolving anisotropy on the stress-strain behaviour of unsaturated soils and proposes a new constitutive elasto-plastic model for unsaturated soils accounting for evolving anisotropy. An extensive campaign of laboratory tests on both isotropically and anisotropically compacted soil samples under a wide range of stress paths was performed. These experimental data were then employed in developing the new model and investigating its performance. A programme of controlled suction triaxial testing was performed on unsaturated and saturated samples of Speswhite kao

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28

Ng, Pui-lam, and 吳沛林. "Constitutive modelling and finite element analysis of reinforced concrete structures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B3897566X.

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29

Sellers, E. J. "Constitutive modelling of the behaviour of clays under cyclic loading." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/8317.

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Includes bibliography.<br>This research work involved the implementation of a constitutive model based on plasticity theory to model the behaviour of a clay under cyclic loading. The modelling must be based on an understanding of the soil response and the critical state theory provides a description of the soil response which then be formulated in terms of plasticity theory. A literature review showed that there is a shortage of information on the behaviour of soils under cyclic loading. Constitutive models for 'cyclic loading are discussed to compare the predictions and thus select a model.

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30

Hoyle, David Matthew. "Constitutive modelling of branched polymer melts in non-linear response." Thesis, University of Leeds, 2010. http://etheses.whiterose.ac.uk/1434/.

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This thesis is concerned with modelling long chain branched polymer melts using the McLeish and Larson Pompom constitutive equations. Usually the non-linear terms in this model are fitted to uniaxial extensional data due its sensitivity to levels of branching, but in this thesis I will study a number of other non-linear flows using this model. For each flow the results are compared to experiments on a set of polyethylene melts. The first flow types I examine are simple shear flows. In a shear step-strain flow the stress relaxation of branched polymers is observed to be time-strain separable, w

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31

SALAMI, MOHAMMAD REZA. "CONSTITUTIVE MODELLING OF CONCRETE AND ROCKS UNDER MULTIAXIAL COMPRESSIVE LOADINGS." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/184202.

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Characterization of stress-deformation behavior of concrete and rocks have been a subject of active research for a long time. Linear elastic, nonlinear (piecewise) linear elastic, elastic-plastic and endochronic models have been proposed and used by various investigators and the literature on the subjects is very wide. A review of various models together with their implementation is numerical (finite element) procedures is presented in Ref. (77). The primary objective of the present study is to develop a generalized constitutive model based on the theory of plasticity. Although such a model ca

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32

Kumar, Nomesh. "Hyperviscoelastic constitutive modelling and crack propagation behavior of solid propellant." Thesis, IIT Delhi, 2018. http://eprint.iitd.ac.in:80//handle/2074/8031.

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33

Petersson, Anders. "Cemented Carbide Sintering : Constitutive Relations and Microstructural Evolution." Doctoral thesis, KTH, Materials Science and Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3733.

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<p>Cemented carbides based on tungsten carbide and cobalt arecommonly produced by a powder metallurgy route including liquidphase sintering. The pressed compact densifies to almost halfits volume during sintering due to pore elimination. Thesintering behaviour changes with material composition, such ascarbide grain size, binder fraction, carbon content andaddition of cubic carbides.</p><p>This thesis is devoted to the study of constitutivebehaviour, in particular densification, and the microstructuralevolution during cemented carbide sintering. Dimensionalchanges are monitored using dilatometr

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34

Gustafsson, David. "Constitutive modelling of the nickel base superalloy IN718, a preparatory study." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15755.

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<p>One of the limiting factors in gas turbine design is the allowable metal temperatures and loads in critical components. Specially designed superalloys are used when the conditions are most severe. One of these superalloys is Inconel 718. To be able to design components for higher temperature and higher loads, an accurate understanding and computational model of the material is needed. In this thesis the deformation mechanisms of Inconel 718 have been investigated and a theoretical basis for modelling in a large deformation context has been established. Finally a viscoplastic nonlinear kinem

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35

Yan, Wai Man. "Experimental study and constitutive modelling of re-compacted completely decomposed granite /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202003%20YAN.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003.<br>Includes bibliographical references (leaves 168-177). Also available in electronic version. Access restricted to campus users.

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36

Popov, Petar Angelov. "Constitutive modelling of shape memory alloys and upscaling of deformable porous media." Texas A&M University, 2003. http://hdl.handle.net/1969.1/2273.

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Shape Memory Alloys (SMAs) are metal alloys which are capable of changing their crystallographic structure as a result of externally applied mechanical or thermal loading. This work is a systematic effort to develop a robust, thermodynamics based, 3-D constitutive model for SMAs with special features, dictated by new experimental observations. The new rate independent model accounts in a unified manner for the stress/thermally induced austenite to oriented martensite phase transformation, the thermally induced austenite to self-accommodated martensite phase transformation as well as the reorie

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37

Man, Hou Michael Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Implicit coupled constitutive relations and an energy-based method for material modelling." Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2009. http://handle.unsw.edu.au/1959.4/43652.

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The contributions of this thesis are an implicit modelling method for the coupled constitutive relations and an energy-based method for material modelling. The two developed methods utilise implicit models to represent material constitutive relations without the requirement of physical parameters. The first method is developed to model coupled constitutive relations using state-space representation with neural networks. State-space representation is employed to express the desired relations in a compact fashion while simultaneously providing the capability of modelling rate- and/or path-depend

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38

Jansson, Mikael. "Hydro-mechanical forming of aluminium tubes : on constitutive modelling and process design." Doctoral thesis, Linköping : Linköping University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8161.

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39

Salim, Md Wadud. "Deformation and degradation aspects of ballast and constitutive modelling under cyclic loading." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050215.114659/index.html.

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40

Faramarzi, Asaad. "Intelligent computational solutions for constitutive modelling of materials in finite element analysis." Thesis, University of Exeter, 2011. http://hdl.handle.net/10036/3305.

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Over the past decades simulation techniques, and in particular finite element method, have been used successfully to predict the response of systems across a whole range of industries including aerospace, automotive, chemical processes, geotechnical engineering and many others. In these numerical analyses, the behaviour of the actual material is approximated with that of an idealised material that deforms in accordance with some constitutive relationships. Therefore, the choice of an appropriate constitutive model that adequately describes the behaviour of the material plays an important role

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41

Rezania, Mohammad. "Evolutionary polynomial regression based constitutive modelling and incorporation in finite element analysis." Thesis, University of Exeter, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.519415.

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42

Ahangarasr, Alireza. "Application of an evolutionary data mining technique for constitutive modelling of geomaterials." Thesis, University of Exeter, 2012. http://hdl.handle.net/10871/9925.

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Modelling behaviour of materials involves approximating the actual behaviour with that of an idealised material that deforms in accordance with some constitutive relationships. Several constitutive models have been developed for various materials many of which involve determination of material parameters with no physical meaning. ANN is a computer-based modelling technique for computation and knowledge representation inspired by the neural architecture and operation of the human brain. It has been shown by various researchers that ANNs offer outstanding advantages in constitutive modelling of

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43

Rigby, Douglas Bertrand. "Testing and constitutive modelling of saturated interfaces in dynamic soil-structure interaction." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/187454.

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Cyclic direct and simple-shear experiments are conducted on remolded clay-steel interfaces under undrained conditions and a constant normal stress. Also, a constitutive model for the stress-strain-pore-pressure behavior of cohesive soil interfaces under dynamic loading is developed using the new unified disturbed state concept (DSC). The model is based on elasto-plasticity theory as defined by the hierarchical single surface (HISS) plasticity model. The proposed model is calibrated with laboratory tests and is shown to capture the complex strain-softening, degradation, and pore pressure behavi

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Dabeet, Antone E. "A practical model for load-unload-reload cycles on sand." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/4082.

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The behaviour of sands during loading has been studied in great detail. However, little work has been devoted to understanding the response of sands in unloading. Drained triaxial tests indicate that, contrary to the expected elastic behaviour, sand often exhibit contractive behaviour when unloaded. Undrained cyclic simple shear tests show that the increase in pore water pressure generated during the unloading cycle often exceeds that generated during loading. The tendency to contract upon unloading is important in engineering practice as an increase in pore water pressure during earthquake lo

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45

Cousins, Benjamin Thomas Spencer. "Development of improved numerical techniques for high strain rate deformation behaviour of titanium alloys." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:f735e95f-f473-4c98-b133-53dfaa76d083.

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Within the aerospace industry, the reduction of costs associated with operation, manufacture and development of gas turbine engines is a primary objective. Component and assembly design optimisations can satisfy weight reductions which correspond to operational and manufacturing cost reductions. Development cost can be reduced by implementing additional numerical validation stages as an alternative to experimental validation alone. Therefore, the overarching purpose of this research is the development of a computationally efficient constitutive modelling tool, which predicts the macroscopic de

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46

Robin, Victor Paul Michel. "Analytical and numerical modelling of artificially structured soils." Thesis, University of Exeter, 2014. http://hdl.handle.net/10871/16565.

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The effects of lime treatment on the mechanical properties of soils are usually not accounted for in the design of geotechnical structures. As a result the potential of lime treatment has not been fully exploited. In this thesis, a comprehensive experimental program has been carried out to identity the key features of the mechanical behaviour of structured materials. The chemical modifications arising from lime treatment were quantified using thermal analysis methods. From these results a non-linear chemo-mechanical coupling was established between the concentration of cementitious compounds a

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47

Leidermark, Daniel. "Modelling of constitutive and fatigue behaviour of a single-crystal nickel-base superalloy." Licentiate thesis, Linköping University, Linköping University, Solid Mechanics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56288.

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<p>In this licentiate thesis the work done in the project KME410 will be presented. The overall objective of this project is to evaluate and develop tools for designing against fatigue in single-crystal nickel-base superalloys in gas turbines. Experiments have been done on single-crystal nickel-base superalloy specimens in order to investigate the mechanical behaviour of the material. The constitutive behaviour has been modelled and verified by simulations of the experiments. Furthermore, the microstructural degradation during long-time ageing has been investigated with respect

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48

Uchaipichat, Anuchit Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Experimental investigation and constitutive modelling of thermo-hydro-mechanical coupling in unsaturated soils." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2005. http://handle.unsw.edu.au/1959.4/22068.

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A thermo-elastic-plastic model for unsaturated soils has been presented based on the effective stress principle considering the thermo-mechanical and suction coupling effects. The thermo-elastic-plastic constitutive equations for stress-strain relations of the solid skeleton and changes in fluid content and entropy for unsaturated soils have been established. A plasticity model is derived from energy considerations. The model derived covers both associative and non-associative flow behaviours and the modified Cam-Clay is considered as a special case. All model coefficients are identified in te

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49

Habte, Michael Andebrhan Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Numerical and constitutive modelling of monotonic and cyclic loading in variably saturated soils." Awarded by:University of New South Wales. Civil and Environmental Engineering, 2006. http://handle.unsw.edu.au/1959.4/24204.

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A fully coupled, effective stress based elasto-plastic model is presented for a rigorous analysis of flow and deformation in variably saturated porous media subjected to monotonic and cyclic loading. The governing equations are derived based on the effective stress concept, equations of equilibrium, and conservation equations of mass and momentum using a systematic macroscopic approach. Both elastic and elasto-plastic constitutive equations are developed. All model coefficients are identified in terms of measurable parameters. The governing equations presented are general in nature, embodying

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50

Post, Johannes. "On the constitutive behaviour of Sandvik Nanoflex modelling, experiments and multi-stage forming /." Enschede : University of Twente [Host], 2004. http://doc.utwente.nl/50846.

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